• CF368 E


    主席树 其实暴力二维树状还更快

    #include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    const int MAXN = 2005;
    
    int N,M,K,Q;
    struct Node{
    	int x,y,w;
    	Node(int a=0, int b=0, int c=0):x(a),y(b),w(c){}
    	bool operator < (Node T) {
    		if(x != T.x) return x < T.x;
    		else return y < T.y;
    	} 
    };
    struct Ask{
    	int x1,y1,x2,y2; int ty; 
    }Do[1000005];
    ll ans[1000005];
    
    int vis[MAXN];
    vector<Node> gar[MAXN];
    vector<int> has[MAXN];
    
    int root[MAXN];
    struct Pode{
    	int ls,rs; ll sum;
    }tree[MAXN*30];
    int tot;
    int Update(int pos,int num,int l,int r,int pre){
    	int rt = ++tot;
    	tree[rt] = tree[pre];
    	tree[rt].sum += num;
    	if(l == r) return rt;
    	int m = (l+r)>>1;
    	if(pos <= m) tree[rt].ls = Update(pos,num,l,m,tree[pre].ls);
    	else tree[rt].rs = Update(pos,num,m+1,r,tree[pre].rs);
    	return rt;
    }
    ll Query(int L,int R,int l,int r,int rt) {
    	if(!rt) return 0;
    	if(L <= l && r <= R) return tree[rt].sum;
    	int m = (l+r) >>1;
    	ll ans = 0;
    	if(L <= m) ans += Query(L,R,l,m,tree[rt].ls);
    	if(R > m)  ans += Query(L,R,m+1,r,tree[rt].rs);
    	return ans;
    }
    
    int main(){
    	while(~scanf("%d %d %d",&N,&M,&K)) {
    		memset(ans,0,sizeof(ans));
    		for(int i = 1; i <= K; ++i) gar[i].clear(), has[i].clear();
    
    		for(int i = 1; i <= K; ++i) {
    			vis[i] = 1;
    			int a; scanf("%d",&a);
    			for(int j = 0; j < a; ++j) {
    				int b,c,d; scanf("%d %d %d",&b,&c,&d);
    				gar[i].push_back(Node(b,c,d));
    			}
    			sort(gar[i].begin(), gar[i].end());
    		}
    		
    		scanf("%d",&Q);
    		for(int i = 1; i <= Q; ++i) {
    			char a[10]; scanf("%s",a);
    			if(a[0] == 'S') {
    				int b; scanf("%d",&b); Do[i].ty = 2;
    				vis[b] ^= 1; 	
    			}else {
    				scanf("%d %d %d %d",&Do[i].x1,&Do[i].y1,&Do[i].x2,&Do[i].y2); Do[i].ty = 1;
    				for(int j = 1; j <= K; ++j) {
    					if(vis[j]) {
    						has[j].push_back(i);
    					}
    				}
    			}
    		}
    
    		tree[0].ls = tree[0].rs = tree[0].sum = 0;
    		for(int i = 1; i <= K; ++i) {
    			tot = 0; root[0] = 0;
    			for(int j = 0; j < (int)gar[i].size(); ++j) {
    				root[j+1] = Update(gar[i][j].y, gar[i][j].w, 1,M,root[j]);
    			}
    			for(int j = 0; j < (int)has[i].size(); ++j) {
    				int tt = has[i][j];
    				int x1 = Do[tt].x1; int y1 = Do[tt].y1; int x2 = Do[tt].x2; int y2 = Do[tt].y2;
    				
    				Node t1 = Node(x2,M+1);
    				int pos = lower_bound(gar[i].begin(), gar[i].end(), t1)-gar[i].begin(); 
    				if(pos) ans[tt] += Query(y1,y2,1,M,root[pos]);
    
    				Node t2 = Node(x1,0);
    				int _pos = lower_bound(gar[i].begin(), gar[i].end(), t2)-gar[i].begin();
    			   	if(_pos) ans[tt] -= Query(y1,y2,1,M,root[_pos]);
    			}
    		}
    		for(int i = 1; i <= Q; ++i) {
    			if(Do[i].ty == 1) printf("%lld
    ",ans[i]);
    		}
    	}
    	return 0;
    }
    


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  • 原文地址:https://www.cnblogs.com/Basasuya/p/8433760.html
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